Manchester City bosses apologised to Chelsea after the west club's anthem 'One Step Beyond' was played after their 6-0 drubbing on Sunday.
's side tore their opponent's to pieces as they returned to the top of the table.
If the result alone was not hard enough for Chelsea fans to take, exiting the stadium to the sound of Madness' 'One Step Beyond', a club anthem at Stamford Bridge, compounded the misery.
Raheem Sterling scored the opener after four minutes, a sign that it was going to be a long afternoon for Maurizio Sarri's side.
Aguero made it 2-0 nine minutes later with a stunning strike from distance and pressure was mounting with every goal conceded on Sarri.
Ilkay Gundogan got in on the act as Guardiola's side continued to keep the pressure on title rivals Liverpool following their win over Bournemouth at Anfield.
Chelsea now need to haul themselves off the canvas for Thursday's trip to face Malmo in the Europa League before taking on an in-form Manchester United in the FA Cup.